How to iterate a QStringList from a specific position its end()

[mireiner]

Hi there,

how to iterate QStringList from a specific posistion to its end. Both examples don't work:


QStringList stringlist;

for (int i = 4; !stringlist[i].isNull(); i++){}

for (QStringList::iterator it = stringlist.at(4); it != stringlist.end(); ++it) {}
How its down right?

Hi there,

how to iterate QStringList from a specific posistion to its end. Both examples don't work:


QStringList stringlist;

for (int i = 4; !stringlist[i].isNull(); i++){}

for (QStringList::iterator it = stringlist.at(4); it != stringlist.end(); ++it) {}
How its down right?

Hi there,

how to iterate QStringList from a specific posistion to its end. Both examples don't work:


QStringList stringlist;

for (int i = 4; !stringlist[i].isNull(); i++){}

for (QStringList::iterator it = stringlist.at(4); it != stringlist.end(); ++it) {}
How its down right?

Added after 25 minutes:

Just found a solution for myself:


QStringList stringlist;

for (QStringList::iterator it = stringlist.begin()+4; it != stringlist.end(); ++it)
{
do something;
}
Is this the easiest way to do this?

[d_stranz]

Is this the easiest way to do this?

It is one way to do it. In your examples, "stringlist.at()" does not return an iterator, it returns the QString at the location you give as an argument and won't compile. "stringlist[i]" also returns the QString at "i", but in your code there is nothing to prevent the index from going off the end of the list. It will compile but will probably blow up at runtime.

[anda_skoa]

It will compile but will probably blow up at runtime.
Exactly, unless come other code guarantees that the last element in the list is a null string.

Why not check if the current value of "i" is still valid?

Cheers,
_

[Lesiok]

Something like this :
QStringList stringlist;

for (int i = 4; i < stringlist.size(); i++){}